package com.ny.demo527;

import java.sql.*;
import java.util.Scanner;

public class LoginDemo {

    private static  final  String URL="jdbc:mysql://localhost:3306/usersdb";
    private  static  final  String DB_username="root";
    private  static  final  String DB_password="123456";

    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        Class.forName("com.mysql.cj.jdbc.Driver");
        Connection connection = DriverManager.getConnection(URL,DB_username,DB_password);
        String sql ="select * from userdb where username =? and password=?";
        PreparedStatement preparedStatement = connection.prepareStatement(sql);
        Scanner scanner=new Scanner(System.in);
        System.out.println("请输入用户名");
        String username = scanner.next();
        System.out.println("请输入密码");
        String password = scanner.next();
        preparedStatement.setString(1,username);
        preparedStatement.setString(2,password);
        ResultSet resultSet =preparedStatement.executeQuery();

        if (resultSet.next()){
            System.out.println("登陆成功");
        }
        else {
            System.out.println("登录失败");
        }
    }
}
